Abstract: A method of making a foam-filled tire wherein a resilient elastomeric foam is formed and cured within a tire carcass while the carcass interior is at super-atmospheric pressure. Such superatmospheric pressure is believed to support the cell walls against internally generated gas (blowing) pressures, thereby stabilizing the cells at higher than usual internal cell pressure. The foaming operation is carried out so that the foam only partially fills the carcass interior. After the elastomeric foam has been cured the tire carcass interior is depressurized down to the pressure to be used in service. During the depressurization process the internal cell pressures cause the cells to expand and further fill the tire interior space. The depressurization processis carried out after the elastomeric foam has been cured, i.e. when the cell walls have attained their full potential strength.